脉冲电流对铜热浸镀铝界面扩散行为的影响机理分析  

Influence of pulse current on interface diffusion behavior of copper hot dip aluminum plating

作　　者：张俊鹏 黄华贵 燕猛[1,2] 刘冬冬 赵阳 ZHANG Junpeng;HUANG Huagui;YAN Meng;LIU Dongdong;ZHAO Yang(National Engineering Research Center for Equipment and Technology of Cold Strip Rolling,Yanshan University,Qinhuangdao,Hebei 066004,China;School of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China)

机构地区：[1]燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004 [2]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《燕山大学学报》2020年第4期347-352,共6页Journal of Yanshan University

基　　金：国家自然科学基金资助项目(51474189);河北省杰出青年基金资助项目(E2018203446)。

摘　　要：以铜热浸镀铝界面扩散层调控问题为对象,通过在制备过程中施加不同强度和频率的脉冲电流,研究了脉冲电流参数及电极连接方式对铜/铝复合界面扩散行为的影响规律和作用机理。结果表明,电流密度由0.9×10^6A/m^2提高至2.84×10^6 A/m^2,无论铜基体接正极还是负极,扩散层厚度先减小再增大;电流密度不变,将脉冲频率从400 Hz逐渐增加至600 Hz,扩散层厚度有所减薄。电子风力和原子的电阻差异是影响电场中液态金属原子间相互扩散的主要原因,因此,通过调整脉冲参数可以实现扩散层厚度的定量化控制,研究结果为调控层状复合材料结合性能和导电性能提供了一种新的可选方案。The regulation of copper hot-dip aluminized interfacial diffusion layer with good bonding strength and diffusion layer properties are studiedby applying high-frequency currents with different current intensities and pulse frequencies during the preparation process.The influence of pulse current parameters and electrode connection methods on the diffusion behavior of copper/aluminum composite interface is studied.The studyresults show that the current density has an influence on the atomic diffusion mode by pulse current.The quantitative control of the thickness of the diffusion layer can be obtainedby specific pulse parameters,but it does not affect the distribution of copper and aluminum content.In the range of 0.9×106 A/m 2 to 2.84×106 A/m 2,as the current density increases,the thickness of the diffusion layer first decreases,and then increases regardless of whether the copper substrate is connected to the positive electrode or the negative electrode.The pulse frequency is gradually increased from 400 Hz to 600 Hz,and as the pulse frequency increases,the thickness of the diffusion layer is reduced.The difference between the electric wind and the resistance of the atom is a main reason that affects the interdiffusion between the liquid metal atoms in the electric field.The use of the pulse current has an influence on the atom diffusion mode.Therefore,the quantitative control of the thickness of the diffusion layer can be obtained by specific pulse parameters.The study results provide a new alternative methodfor controlling the bonding properties and conductivity of layered composites.

关 键 词：脉冲电流 铜热浸镀铝 复合界面 铜/铝复合材料 扩散行为 

分 类 号：TG331[金属学及工艺—金属压力加工]